Booting from a live CD, I've tried a few of the different outputs available on initial setup (DVI-1, VGA-1, NTSC DVI, etc) and on all of them, there is no vsync and games play really fast. I went ahead and installed to a USB drive though, and tried different combinations turning off and on throttling, syncrefresh, and vsync via mame.ini and nothing changed.
Any clue why this is happening. My best guess is this is most likely due to GroovyArcade being intended for older ATI/AMD cards. Would it be possible to install propietary drivers from AMD to fix it? Would that then break the modeline switching?
For background, in Windows my 7970 has been working pretty well with a combo of GroovyMAME and the Custom Resolution Utility from ToastyX to play games on my Sony PVM monitor. I still feel like there is about 1 frame of lag, at least on some shooters like Battle Garegga, even with frame_delay set to 8. Was hoping running GroovyArcade would eliminate that last little bit of lag.